2001-2006 HD (Heavy Duty) Classic Body

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Dual box under the seat

Dual box under the seat

Dual sub box behind the seat

Dual sub box behind the seat

Single sub box under the seat

Single sub box under the seat

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Xtreme Enclosures

Dual Sub Box (behind rear seat)2001-2006 GM SIERRA HD CREW

Now: $310.70

MSRP: $466.05

Was:

Fits 2001-2006 Chevrolet Silverado / GMC Sierra Crew Cab Heavy Duty 1500 2500 AND 3500 Series Truck Note: ( FITS ONLY HD MODELS ) also fits 2007 classic body crew Fits two 8 inch or two 10 inch subwoofers Fits behind rear seat Mo…

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Xtreme Enclosures

DUAL SUB BOX 2001-2006 GM SIERRA CREW HD

Now: $310.70

MSRP: $466.05

Was:

This box is designed to fit 2001-2006 Chevy Silverado Crew Cab HD Series and 2001-2006 GMC Sierra HD Series Crew Cab Trucks. This will not fit the Silverado Ext Cab. ONLY FITS THE 2500 AND 3500 SERIES CREW CABS. Will not fit 1500 …

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Xtreme Enclosures

SINGLE SUB BOX 2001-2006 GM SIERRA CREW HD

Now: $245.70

MSRP: $368.55

Was:

Fits 2001 to 2006 Chevrolet Silverado / GMC Sierra Crew Heavy Duty truck; 1500 HD 2500 HD and 3500 HD NOTE: Does not fit the Half-ton crew. We have another box available for the half ton crew cab truck. FEATURES: Fits one 8 inch …

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